Done right, a prawn cocktail is a beautiful Christmas starter - and John Torode's the man to show you how. Bring a large pan of water to the boil and add a squeeze of lemon and glug of vinegar.

A prawn cocktail is the perfect appetizer any time of the year. Refreshing, crisp, and so savory. A must-try! It is the perfect start to dinner, brunch, or just because. Once you try it ...